Showing papers by "Jung-Ju Lee published in 1999"
TL;DR: In this article, the authors investigated the electrical resistance change as a damage parameter of fatigue damage such as the degradation of residual strength and stiffness, and predicted the future damage of composite laminates in fatigue loading from electrical resistance damage model by following a stiffness degradation model.
181 citations
TL;DR: In this article, the shape recovery force associated with SMA wire actuators was investigated for the purpose of enhancing the critical buckling temperature and reducing the lateral deflection for the thermal buckling.
67 citations
TL;DR: In this article, numerical simulation analyses of the thermal buckling behavior of laminated composite shells with embedded shape memory alloy (SMA) wires were performed to investigate the effect of embedded SMA wires on the characteristics of thermal bucking.
54 citations
TL;DR: In this article, an experimental analysis on the active buckling control behavior of a laminated composite beam with embedded shape memory alloy (SMA) wires is presented, for the purpose of enhancing the critical buckling load.
48 citations
TL;DR: In this paper, the authors investigated the tensile and fatigue properties of the optical fiber sensor embedded within the composite laminate and found that the fatigue strength of optical fiber embedded within unidirectional ply laminate fractured due to the fatigue damage accumulation of internal defects of the fiber itself.
Abstract: Mechanical behavior, such as tensile and fatigue strength, of the optical fiber sensor embedded within the composite laminate was investigated. Tensile and fatigue tests were performed to evaluate the static and fatigue characteristics of optical fibers embedded within three types of laminated composite specimens, [06/OF/06]T, [02/904/OF/904/02]T and [03/903/OF/903/03]T. The initiation of damage and fracture of the optical fiber were detected by observation of the intensity drop-off of laser signal transmitted through the optical fiber during test. Experimental results showed that the fatigue strength of optical fiber embedded within the cross-ply laminate is much lower than the fatigue strength of optical fiber within the unidirectional ply laminate. It was also found that the optical fiber embedded within unidirectional ply laminate fractured due to the fatigue damage accumulation of internal defects of optical fiber itself. However the optical fiber embedded within the cross-ply laminate fractured due to the growth of transverse matrix crack of host composite laminate.
10 citations